Rock and Roll with Ember.js v1.13.3 is out

Book version 1.13.3 is rolling out as we speak (ok, we don’t speak and you
probably read this later, but you get the point) which contains the following
changes:

Upgrade to Ember version 1.13.3 (the book is in lockstep, too!)

Update to Ember CLI 1.13.1

Extended the Components chapter with closure actions.

Closure actions are an awesome new way to fire/handle actions introduced
in 1.13 and so it has to be in the book!
* Extended the Testing chapter with component integration tests.

Integration tests make component tests super simple to set up and so much more
descriptive than unit tests. Our beloved star-rating component is now tested
by the shiny new integration tests.
* Get rid of needs in the controller.

There was one instance where I used this to get a nice placeholder text. As a
preparation for Ember 2.0 where needs is going the way of the dodo, I
removed that nasty needs.
* Specify the band-songs relationship as sync.

Starting from 2.0, Ember Data relationships are assumed to be asynchronous
unless otherwise specified. In the Rock & Roll application, we sideload the
songs with the bands, so adding a { async: false } option to the
relationship was in order.
* A few CSS fixes, one of them thanks to lonekorean